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Home >> Jeep >> 2009 >> Wrangler X, Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0579 To P0645 - NGC >> P0585-Speed Control Switch 1/2 Correlation >> Possible Causes
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Possible Causes

Possible Causes 
S/C SWITCH SIGNAL CIRCUITS SHORTED TO VOLTAGE
RESISTANCE IN THE S/C SWITCH SIGNAL CIRCUITS
RESISTANCE IN THE (V937) S/C SWITCH GROUND CIRCUIT
S/C SWITCH SIGNAL CIRCUITS SHORTED TO THE (V937) S/C SWITCH GROUND CIRCUIT
(V71) S/C SIGNAL 1 CIRCUIT SHORTED TO THE (V72) S/C SIGNAL 2 CIRCUIT
S/C SWITCH SIGNAL CIRCUITS SHORTED TO GROUND
CLOCKSPRING
SPEED CONTROL SWITCH
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure  .